STOP Early Journal Content on JSTOR, Free to Anyone in the World This article is one of nearly 500,000 scholarly works digitized and made freely available to everyone in the world by JSTOR. Known as the Early Journal Content, this set of works include research articles, news, letters, and other writings published in more than 200 of the oldest leading academic journals. The works date from the mid-seventeenth to the early twentieth centuries. We encourage people to read and share the Early Journal Content openly and to tell others that this resource exists. People may post this content online or redistribute in any way for non-commercial purposes. Read more about Early Journal Content at http://about.jstor.org/participate-jstor/individuals/early- journal-content . JSTOR is a digital library of academic journals, books, and primary source objects. JSTOR helps people discover, use, and build upon a wide range of content through a powerful research and teaching platform, and preserves this content for future generations. JSTOR is part of ITHAKA, a not-for-profit organization that also includes Ithaka S+R and Portico. For more information about JSTOR, please contact email@example.com. J&A J? f tp ZOOL< OGICAL BUI XETIN £—d \y >• J—/ v_ s \>i v.^// \.m—j i_*/ \_y i. EDITED BY ~>1_ s JL~J M. i. X 1 c. o. WHITMAN and W. M. WHEELER, The University of Chicago. WITH THE CO-OPERATION OF E. P. Allis, Jr., T. Dwight, D. S. Jordan, W. W. Norman, J. A. Allen, C. H. ElGENMANN, E. O. JORDAN, A. S. Packard, E. A. Andrews, G. ElSEN, J. S. KlNGSLEY, G. H. Parker, H. Ayers, D. G. Elliot, C. A. Kofoid, W. Patten, G. Baur, A. C. Eycleshymer, F. S. Lee, J. I. Peck, C. L. Bristol, Katharine Foot, F. R. Lillie, G. W. Peckham, W. K. Brooks, S. A. Forbes, W. A. Locy, J. Reighard, H. C. Bumpus, S. H. Gage, J. Loeb, W. E. RlTTER, C. M. Child, E. G. Gardiner, A. B. Macallum, W. B. Scott, Cornelia M. Clapp, T. Gill, F. P. Mall, S. H. SCUDDER, G. P. Clark, C. W. Hargitt, C. F. W. McClure, S. I. Smith, S. F. Clarke, S. Henshaw, J. P. McMurrich, C. W. Stiles, Agnes M. Claypole, F. H. Herrick, A. D. Mead, H. B. Ward, J. H. Comstock, C. F. Hodge, M. M. Metcalf, S. Watase, E. G. CONKLIN, L. O. Howard, T. H. Morgan, M. A. Willcox, U. Dahlgren, W. H. Howell, A. D. Morrill, S. W. Williston, C. B. Davenport, A. Hyatt, E. S. Morse, H. V. Wilson, C. W. Dodge, H. P. Johnson, H. F. Nachtrieb, R. R. Wright. H. H. Donaldson, Vol. I. August, 1897. BOSTON, U.S.A.: GINN & COMPANY. No. 1. Agent for Great Britain: Agents for Germany: Agent for France: EDWARD ARNOLD, R. FRIEDLANDER & SOHN, JULES PEELMAN, 37, Bedford Street, Strand, Berlin, N. TV., 189, Boulevard, Saint- London, IV.C. Carlstrasse ir. Germain, Paris. Single numbers, 75 cents. Per annum (6 numbers), $3.00. 4 K A <*> $ % F Copyright, 1897, by Ginn &, Company. CONTENTS OF No. i, AUGUST, 1897. I. The Morphology of the Petrosal Bone and of the Sphenoidal Region of the Skztll of Amia Calva 1—26 Edward Phelps Allis, Jr. II. Recent Experiments on Regeneration .... 27—34 Charles W. Hargitt. III. The Metamerism of Nephelis. A Contribution to the Morphology of the Nervous System, together with a Description of Nephelis Lateralis . . 35—39 Charles Lawrence Bristol. IV. Remarks on the Question of Intercalation of Vertebrae 41—55 G. Baur. ifflbe athenaeum ■paii. GINN & COMPANY, BOSTON, U.S.A.